Advanced format ruling
Tree Otter
Card effect (current official text)Once per turn: You can target 1 face-up monster you control; it gains 1000 ATK until the end of this turn. You must control a Beast-Type monster (other than this card) to activate and to resolve this effect.
Current rulings for this card are maintained by Konami.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Advanced forum — sourced change requests get reviewed.